Your roof: Savièse
For a detached house, check roof condition, shading and electrical capacity before signing. A single owner’s decision still requires a technical roof survey.
In all cases, the useful surface area is almost always less than the gross surface area announced. Skylights, chimneys, setbacks, shading and future maintenance needs must be integrated before talking about final power.
Reserve space and access for inspections and future replacements. Value surplus using the confirmed export contract, with guarantees of origin accounted for separately.
Exposure and access: Savièse
Request a survey of nearby shading and the horizon, with monthly generation estimates. Compare options for your building using the same weather data and loss assumptions.
Request the weather assumptions, losses and monthly results behind the stated output. Agree on tests, inspections and documents to be provided at handover.
Full cost and grants: Savièse
The displayed scenario uses an indicative installed cost for 8 kWp. A quote must specify equipment, roofing and electrical work, connection, inspections and fees before deducting confirmed grants.
Programmes depend on the municipality and available funds. Obtain written confirmation of amounts, timing, limits and combined support for your address before including them in the budget.
Use the building’s hourly consumption to size the project. Distinguish avoided purchase costs from the tariff paid for exported surplus.
Output must be assessed for the actual roof, its orientation, shading and condition. Tariffs depend on the grid, product and contract; a cantonal average does not replace your bill.
Building procedures: Savièse
Simulate generation and available surplus before choosing a battery. Distinguish avoided purchase costs from the tariff paid for exported surplus.
A serious estimate specifies who prepares the announcement, who manages the connection, who follows the administrative back and forth and how any comments are absorbed into the planning.
In Valais, residential photovoltaics first go through Pronovo; Any municipal aid or other energy measures must be confirmed before signature.
Prepare a timetable showing procedures, approvals and work in their actual sequence. Keep the simulation assumptions so results can be compared after commissioning.
